Imagine you made a list of all the good things you wanted more of from Thief: The Dark Age and then also made a list of bad things you wanted to go away, at least for most of the time. Now imagine that the developers got your lists, and then built their next game around them, as well as tossing in a few new tricks they came up with on their own. Welcome to The Metal Age.
While Thief 1 had issues stemming from "Garrett's profession is 'thief,' not 'adventuring archaeologist' and/or 'undead slaughterer,'" Thief 2 makes a point of pitting you against normal guards and other humans, as well as keeping you within the boundaries of the still-active City. Said guards are also smarter and more alert than before, particularly on Expert, making for a greater challenge. Garrett also gets a bit more talkative, and the new Secrets system quantifies just how awesome you are at getting into the well-stocked nooks and crannies of the levels.
Original Archived Let's Play available at the Let's Play Archive